code: def legacy_pickle(request):
      return request.param
  
file_path: geopandas/geopandas/io/tests/test_pickle.py
imports: import glob
  import os
  import pathlib
  import pandas
  import pytest
  from geopandas.testing import assert_geodataframe_equal
label_desc: Use image node_id 2 for calling a global function with example usage: legacy_pickle(request) and returns: request